Windows
CVE-2026-20940
HIGH
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
2DescriptionCVE.org
Heap-based buffer overflow in Windows Cloud Files Mini Filter Driver allows an authorized attacker to elevate privileges locally.
AnalysisAI
Windows Cloud Files Mini Filter Driver contains a heap-based buffer overflow that enables local privilege escalation on Windows 10 1809, Windows Server 2016, and Windows Server 2022. An authenticated attacker can exploit this vulnerability to gain elevated system privileges without user interaction. No patch is currently available.
Technical ContextAI
Affects Windows 10 1607. Heap-based buffer overflow in Windows Cloud Files Mini Filter Driver allows an authorized attacker to elevate privileges locally.
RemediationAI
Monitor vendor advisories for a patch. Enable ASLR, DEP/NX, and stack canaries where possible.
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Same weakness CWE-822 – Untrusted Pointer Dereference
View allSame technique Buffer Overflow
View allShare
External POC / Exploit Code
Leaving vuln.today